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Triple acting radial seal

United States Patent

8,133,014
March 13, 2012
View the Complete Patent at the US Patent & Trademark Office
A triple acting radial seal used as an interstage seal assembly in a gas turbine engine, where the seal assembly includes an interstage seal support extending from a stationary inner shroud of a vane ring, the interstage seal support includes a larger annular radial inward facing groove in which an outer annular floating seal assembly is secured for radial displacement, and the outer annular floating seal assembly includes a smaller annular radial inward facing groove in which an inner annular floating seal assembly is secured also for radial displacement. A compliant seal is secured to the inner annular floating seal assembly. The outer annular floating seal assembly encapsulates the inner annular floating seal assembly which is made from a very low alpha material in order to reduce thermal stress.
Ebert; Todd A (West Palm Beach, FL), Carella; John A (Jupiter, FL)
Florida Turbine Technologies, Inc. (Jupiter, FL)
12/ 542,495
August 17, 2009
FEDERAL RESEARCH STATEMENT This invention was made with Government support under contract number DE-FG02-07ER84668 awarded by Department of Energy. The Government has certain rights in the invention.